package net.tbao.cart.interceptro;

import net.tbao.cart.vo.UserInfoTo;
import net.tbao.common.constant.AuthServerContstant;
import net.tbao.common.constant.CartConstant;
import net.tbao.common.vo.MenberResponVO;
import org.apache.commons.lang.StringUtils;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.UUID;

/**
 * 拦截器
 */
public class CartInterceptro implements HandlerInterceptor {
    public static ThreadLocal<UserInfoTo> toThreadLocal=new ThreadLocal<>();

    /**
     * 目标方法执行之前
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        UserInfoTo userInfoTo=new UserInfoTo();
        HttpSession session = request.getSession();
        MenberResponVO menber = (MenberResponVO) session.getAttribute(AuthServerContstant.LOGIN_USER);
        //TODO 已登录状态
        if(menber!=null) {
            userInfoTo.setUserId(menber.getId());
        }
        Cookie[] cookies = request.getCookies();
        if(cookies!=null&&cookies.length>0){
            for (Cookie cookie : cookies) {

                String name = cookie.getName();
                if (name.equals(CartConstant.TEMP_USER_COOKIE_NAME)){
                    userInfoTo.setUserKey(cookie.getValue());
                    userInfoTo.setTempUser(true);
                }

            }

        }
        //分配临时用户
        if(StringUtils.isEmpty(userInfoTo.getUserKey())){
            String s = UUID.randomUUID().toString();
            userInfoTo.setUserKey(s);
        }
        //目标方法执行之前
        toThreadLocal.set(userInfoTo);

        return true;
    }

    /**
     * 业务执行之后
     * @param request
     * @param response
     * @param handler
     * @param modelAndView
     * @throws Exception
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        UserInfoTo userInfoTo = toThreadLocal.get();
        if(!userInfoTo.isTempUser()){
            Cookie cookie = new Cookie(CartConstant.TEMP_USER_COOKIE_NAME, userInfoTo.getUserKey());
            cookie.setDomain("tbao.cn");
            cookie.setMaxAge(CartConstant.TEMP_USER_COOKIE_TIMEOUT);
            response.addCookie(cookie);
        }

    }
}
